Last night, Swizz Beatz and Just Blaze engaged in a “battle of the beats.” It streamed live on YouTube and lasted for over two hours. At one point, Swizz dropped an unreleased song that appears to feature Jay Z, Nas, DMX, and Jadakiss. (The producer seemed to confirm that all four men were on the track when he retweeted the below Busta Rhymes reaction gif.) The entire battle is available below via Hot 97. Find the track with Jay, Nas, DMX, and Jadakiss at 2:27:12.